Question

Effective nuclear charge $\left(Z^{\ast }\right)$ can be calculated by using the formula:

• A. $Z^{\ast }=Z-S$
• B. $Z^{\ast }=Z+S$
• C. $Z^{\ast }=S-Z$
• D. $Z=Z^{\ast }-S$

Answer 1

The correct option is A $Z^{\ast }=Z-S$

Effective nuclear charge ($Z^{\ast }$) can be calculated by using the formula $Z^{\ast }=Z-S$
$Z=$ atomic number
$S=$ shielding constant which is directly proportional to the number of inner shell electrons.